Historical lexicography and history of words fail to examine the validity of the words in old dictionaries. This gap is attempted to be filled up with this present study on the five-language dictionary (Latin, Italian, German, Croatian, and Hungarian) compiled by Faust Vrančić, a Croatian author, published in 1595, which is analysed by seven criteria. The words analysed are equivalent to Latin nouns and adjectives. The Latin lexemes comprise more than half of the entries, which is a substantial sample to draw general conclusions. It is pointed out in the study that the dictionary provided help primarily in understanding Latin texts. It may have been to the greatest use of speakers of the four (non-Latin) vulgar languages at mother-tongue competence or those who were familiar with them. The dictionary seems not to have been adequate in all cases for those interested in these languages to enlarge their vocabulary.